Corneal deformation signal waveform analysis in keratoconic versus post-femtosecond laser in situ keratomileusis eyes after statistical correction for potentially confounding factors

Zarei‐Ghanavati, Siamak; Ramírez-Miranda, Arturo; Yu, Fei; Hamilton, D. Rex

doi:10.1016/j.jcrs.2011.11.033

Cited by 23 publications

(16 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detailed explanations of each CDSW parameter have been described before 27. We found higher aindex, p1area, dive2 and mslew2 values in the acromegaly group.…”

Section: Discussionsupporting

confidence: 52%

Corneal biomechanical properties of patients with acromegaly

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Detailed explanations of each CDSW parameter have been described before 27. We found higher aindex, p1area, dive2 and mslew2 values in the acromegaly group.…”

Section: Discussionsupporting

confidence: 52%

Corneal biomechanical properties of patients with acromegaly

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Among them, corneal hysteresis (CH) and corneal resistance factor (CRF) have been investigated extensively in different patient groups [12], [13], [14]. These measures provide qualitative information about the biomechanical state of the cornea and additional waveform analysis has been investigated [15], [16], [17]. CoST also uses an air-puff to deform the cornea.…”

Section: Introductionmentioning

confidence: 99%

Biomechanics of the Cornea Evaluated by Spectral Analysis of Waveforms from Ocular Response Analyzer and Corvis-ST

et al. 2014

View full text Add to dashboard Cite

PurposeIn this study, spectral analysis of the deformation signal from Corvis-ST (CoST) and reflected light intensity from ocular response analyzer (ORA) was performed to evaluate biomechanical concordance with each other.MethodsThe study was non-interventional, observational, cross-sectional and involved 188 eyes from 94 normal subjects. Three measurements were made on each eye with ORA and CoST each and then averaged for each device. The deformation signal from CoST and reflected light intensity (applanation) signal from ORA was compiled for all the eyes. The ORA signal was inverted about a line joining the two applanation peaks. All the signals were analyzed with Fourier series. The area under the signal curves (AUC), root mean square (RMS) of all the harmonics, lower order (LO included 1st and 2nd order harmonic), higher order (HO up to 6th harmonic), CoST deformation amplitude (DA), corneal hysteresis (CH) and corneal resistance factor (CRF) were analyzed.ResultsThe device variables and those calculated by Fourier transform were statistically significantly different between CoST and ORA. These variables also differed between the eyes of the same subject. There was also statistically significant influence of eyes (left vs. right) on the differences in a sub-set of RMS variables only. CH and CRF differed statistically significantly between the eyes of subject (p<0.001) but not DA (p = 0.65).ConclusionsCoST was statistically significantly different from ORA. CoST may be useful in delineating true biomechanical differences between the eyes of a subject as it reports deformation.

show abstract

“…A recent study analysed multiple biomechanical waveform parameters obtained by ORA and found that six waveform parameters were more useful to distinguish postfemtosecond eyes from keratoconic eyes 14. Several other studies analysed signal waveform of corneal deformation measured using ORA 15 16.…”

Section: Discussionmentioning

confidence: 99%

Comparison of corneal biomechanics after microincision lenticule extraction and small incision lenticule extraction

Wang

Zhang

et al. 2016

Br J Ophthalmol

View full text Add to dashboard Cite

show abstract

Corneal deformation signal waveform analysis in keratoconic versus post-femtosecond laser in situ keratomileusis eyes after statistical correction for potentially confounding factors

Abstract: Differences in multiple biomechanical waveform parameters between the keratoconus and post-LASIK groups suggests that waveform analysis may be useful to differentiate between healthy and diseased biomechanical conditions.

Cited by 23 publications

References 30 publications

Corneal biomechanical properties of patients with acromegaly

Corneal biomechanical properties of patients with acromegaly

Biomechanics of the Cornea Evaluated by Spectral Analysis of Waveforms from Ocular Response Analyzer and Corvis-ST

Comparison of corneal biomechanics after microincision lenticule extraction and small incision lenticule extraction

Contact Info

Product

Resources

About